Operating Instructions and Parts Manual | AL2810 |
Airless Paint Systems
Troubleshooting Chart
| Symptom | Possible Cause(s) | Corrective Action | ||
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| Coarse spray | Low pressure | Increase the pressure | ||
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| Excessive fogging | 1. | High pressure | 1. | Reduce pressure to satisfactory pattern distribution. |
| (overspray) | 2. | Material too thin | 2. | Use less thinner. |
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| Pattern too wide | Spray angle too large | Use smaller spray angle tip. | ||
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| Pattern too narrow | Spray angle too small | Use larger spray angle tip (if coverage is OK, try tip in same | ||
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| nozzle group). | |
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Too much material | 1. | Nozzle too small |
| 2. | Material too thin |
| 3. | Pressure too high |
1.Use next smaller nozzle.
2.Thicken spray material.
3.Reduce pressure.
| Too little material | 1. | Nozzle too small | 1. | Use next larger nozzle. |
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| 2. | Material too thick | 2. | Thin spray material. |
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| Thin distrubtion in center | 1. | Worn tip | 1. | Change for new tip. |
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| of pattern “horns” | 1. | Wrong tip | 2. | Use nozzle with narrow spray angle. |
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| Thick skin on work | 1. | Material too viscous | 1. | Thin cautiously. |
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| 2. | Application too heavy | 2. Reduce pressure and/or use tip in next larger nozzle group. |
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| Coating fails to close and | Material too viscous | Thin cautiously. |
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| smooth over |
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| Spray pattern irregular, | 1. | Orifice clogged. | 1. | Clean carefully. |
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| deflected | 2. | Tip damaged. | 2. | Replace with new tip. |
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| Craters or pock marks, | Solvent balance | Use 1 to 3% “short” solvents remainder “long” solvents. |
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| bubbles on work |
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| (This is most likely to happen with material of low viscosity, |
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| lacquers, etc.) |
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Clogged screens | 1. | Extraneous material in paint. |
| 2. | Coarse pigments. |
| 3. | Poorly milled pigments (paint |
| pigments glocculate) cover | |
| screen. Incompatible paint | |
| mixture and thinners. | |
1.Clean screen
2.Use coarse screen if orifice size allows.
3.Use coarser screen, larger orifice tips. Obtain ball milled paint. If thinner has been added, test to see if a drop placed on top of paint mixes or flattens out on the surface. If not, try different thinner in fresh batch of paint.
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